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Transactions with Related Parties - Summary of Transactions with Related Parties (Details) - KRW (₩) ₩ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of transactions between related parties [line items] |  |  |
Revenue | ₩ 17,234 | ₩ 18,417 | ₩ 25,741
Purchases | 201 | 70 | 62
GungHo Online Entertainment, Inc. |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Revenue | 17,233 | 18,417 | 25,741
Purchases | 16 | 15 | 20
GungHo Online Entertainment America |  |  |
Disclosure of transactions between related parties [line items] |  |  |
Revenue | 1 | 0 | 0
Purchases | ₩ 185 | ₩ 55 | ₩ 42

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